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<head>
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    <title>西格一期</title>
</head>
<body>
    <article>
        <section class="plant">
            <div class="displayBox">plant</div>
                <section class="workshop">
                    <div class="displayBox">workshop</div>
                        <section class="line">
                           <div class="displayBox">line</div>  
                        </section>
                </section>
        </section>      
    </article>
</body>
</html>